Wuchereria bancrofti microfilarial density of autochthonous cases and natural Culex infectivity rates in northeast Brazil.
J Trop Med Hyg
; 95(3): 214-7, 1992 Jun.
Article
em En
| MEDLINE
| ID: mdl-1597880
Autochthonous Wuchereria bancrofti microfilaraemic cases from three neighbouring cities of Northeast Brazil (Recife, Jaboatao and Olinda) were selected from thick smear or filtration positive individuals and classified by their microfilarial (mf) densities through polycarbonate membrane blood filtration. Individuals were subdivided into two groups: autochthonous cases without any previous specific drug administrations (group A) and those with one or more previous DEC treatments (group B). In Recife, unlike Jaboatao and Olinda (P less than 0.05), the majority of autochthonous cases were over 20 years old and no microfilaraemics were found under the age of 10. The majority of cases in Recife had lower levels of mf density (66.6%), while in Jaboatao and Olinda higher mf carriers (65.6%) prevailed when group A (n = 141) individuals were rearranged in mf density above and below 500 mf ml-1 (P less than 0.01). All subjects in group B (n = 110) had less than 501 mf ml-1 and the great majority less than 100 mf ml-1, but a significant difference (P less than 0.05) between Recife and the two other cities was observed. Captured mosquitoes in Recife, Jaboatao and Olinda totalled 7856, 8010 and 8003 respectively. The infectivity rate found in Recife (0.61%) was significantly lower than in Jaboatao (1.21%) and Olinda (1.31%) (P less than 0.001). The authors discuss the possible influences of previous disease control programmes (medicated salt and individual treatments) applied only to the city of Recife in relation to the outcome of this investigation.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Wuchereria bancrofti
/
Filariose Linfática
/
Culex
Limite:
Animals
/
Female
/
Humans
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
J Trop Med Hyg
Ano de publicação:
1992
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Reino Unido